Unknown Trilobite

[Raptor Lover]

Hey fellow members, I got my first trilobite today at my local fossil shop. I don't know the locality where it was found. Does anyone know what species it is? Thanks -Cameron

[abyssunder]

Congrats for your first trilo!

Looks like Phacops rana, for me.

[Raptor Lover]

Congrats for your first trilo!

Looks like Phacops rana, for me.

Thank you!

After looking up different trilos, I was thinking Phacops haha.

[piranha]

On 11/28/2015 at 5:00 PM, abyssunder said:

...Looks like Phacops rana, for me...

 

 

Phacops rana is not a valid species in Morocco. With that array of lenses, Boeckops stelcki appears to be the best match.

The attached figure shows the maximum possible number of eye lenses for the vertical files (up to eight or can be less).

 

 

McKellar, R.C., & Chatterton, B.D.E. (2009)

Early and Middle Devonian Phacopidae (Trilobita) of southern Morocco.

Palaeontographica Canadiana, 28:1-110

 

 

[Raptor Lover]

Phacops rana is not a valid species in Morocco. With that array of lenses, Boeckops stelcki appears to be the best match.

The attached figure shows the maximum possible number of eye lenses for the vertical files (up to eight or can be less).

IMG1.jpg

Chatterton, B.D.E., & McKellar, R.C. (2009)

Early and Middle Devonian Phacopidae (Trilobita) of southern Morocco.

Palaeontographica Canadiana, 28:1-110

Hmmm oh okay. I don't really know anything about trilos, so thank you

[abyssunder]

Probably you're right, piranha, but for me Barrandeops granulops (Chatterton et al., 2006) looks also a possibility. What do you think, could be?

[piranha]

On 11/29/2015 at 9:01 AM, abyssunder said:

Probably you're right, piranha, but for me Barrandeops granulops (Chatterton et al., 2006) looks also a possibility. What do you think, could be? 1.jpgBarrandeops granulops.jpg

 

 

Yes, I'm aware of Barrandeops granulops, it has a maximum number of 4-6 lenses per file. The posted specimen has eye damage but in my estimation it has files with 7-8 lenses. Look again at the eyes in a side by side comparison, B. granulops clearly has fewer lenses.

 

 

 

[Malcolmt]

Definitely from Morocco and definitely has at least 7 lenses in the middle file perhaps 8 depending on that break at the top.

[Raptor Lover]

Yes, I'm aware of Barrandeops granulops, it has a maximum number of 4-6 lenses per file. The posted specimen has eye damage but in my estimation it has files with 7-8 lenses. Look again at the eyes in a side by side comparison, B. granulops clearly has fewer lenses.

IMG1.jpg

So it is most likely Boeckops stelcki?

[abyssunder]

Your informations are precious as always, piranha. Thank you for the details. I'm glad there's someone who could reveal the hidden content of things.

[piranha]

On 11/29/2015 at 11:17 AM, Raptor Lover said:

So it is most likely Boeckops stelcki?

 

 

Here's another comparison of the eyes, this time with an overlay diagram for the lens configuration comparing Boeckops with Barrandeops. With variability there can be fewer lenses in any given file, not more. Of all the Moroccan phacopids, Boeckops stelcki appears to be the best match.

 

 

 

[Raptor Lover]

Here's another comparison of the eyes, this time with an overlay diagram for the lens configuration comparing Boeckops with Barrandeops. With variability there can be fewer lenses in any given file, not more. Of all the Moroccan phacopids, Boeckops stelcki appears to be the best match.

IMG1.jpg

Your informations are precious as always, piranha. Thank you for the details. I'm glad there's someone who could reveal the hidden content of things.

Definitely from Morocco and definitely has at least 7 lenses in the middle file perhaps 8 depending on that break at the top.

Thank you piranha for all the info! And thank you abyssunder and Malcolmt for your help!